Golf-ball mold.



E. W. BUGKAU. GOLF BALL MOLD. APPLICATION FILED SEPT. 29, 1911.

Patented Aug. 6, 1912.

Ernst mold which can fectly citizen of the United States, residing PATENT OFFIC a1? ERNST W. BUCKAU, OF NEW YORK, N. Y.

GOLF-BALL MOLD.

Specification of Letters Patent. Application filed September 29, 1811.

To all whom it may concern:

Be it known that I, ERNST W. BUOKAU, a

New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Golf-Ball Molds, of which the following is a specification.

This invention relates to golf ball dies, cups or molds, the object of the invention belng to provide an improved golf ball be readily and inexpensivelyhonstructed and by means of which a perfectly rounder spherical golf ball can be obtained having any desired shape of brambles thereon.

It is well known in practice that golf balls provided with brambles are not always perround, due to the manner in which the same are molded. In other words, it has heretofore been the usual practice to provide the golf ball cup with openings or re cesses to form the brambles on the-ball; but these recesses or depressions in the cup have to either be-cut by hand or by machine, the depth of the cutting depending largely upon the manipulation of the operator or the machine, and it is extremely diflicult, and frequently impossible, to get them all of the same depth. Consequently, when the ball is molded itis not a perfectly round ball, as some of the brambles will project less or more than others, and therefore, as stated, a perfectly round ball is rarely obtained.

The object therefore of the present im- Patented Aug. 6, 1912., Serial No. 051,929.

to form a perfect half sphere, being slightly larger than the ball to be molded. Fitting shell 3, which in practice is sweated into the mold or cup 2. This shell is of predetermined thickness throughout and is provided with openings or perforations of the desired form that the bramble is to have; for instance, the perforations may be circular, as 4, or they may be of star or other form, as 5. These openings or perforations extend entirely through the shell, and as the shell is of a uniform thickness throughout it fol- Jowsthat each of the perforations is of the same depth as that ofits-companion-perfo rations.

In practice it is preferable to project the edge of the shell a slight distance, say about .002 of an inch, above the upper edge of the die or cup, as at 6, so that when pressure is placed upon the die cups to mold the ball the shell will be firmly forced into contact at all points with the wall of the and consequently there will be no leakage of the material between the shell and its cup or mold. In other words, the material of which the ball is formed when forced into the openings of the shell cannot leak or run between the shell and the cup proper.

By forming the perforations in a shell, it will be immediately apparent that as the shell is the same thickness throughout it follows that the brambles must be of the same depth around the ball, so that a perfectly true, round ball is obtained when the provement is to provide a golf ball cup or mold by means of which an absolutely true, round ball can be obtained, for the reason that all of the brambles will necessarily be of the same depth.

In the drawings accompanying and forming part of this specification, Figure 1 illustrates a pair of the golf ball cups or molds in juxtaposition as they are usually placed when a ball is to be molded; Fig. 2 is a cross-sectional view of one of the molds; Fig.8 is a view of the shell detached therefrom; Fig. 4 is a view of the shell casing or cup proper; and Fig. 5 is a detail view of a portion of the golf ball having one form of brambles shown herein.

Similar characters of reference indicate corresponding parts throughout the figures of the drawings.

In carrying out the present improvement each cup or mold 2 is scraped to a gage so as material is placed between the two ball cups and the same are brought together under a pressure of many tons, as is the usual practice. From the foregoing it will be observed .that each half of the mold consists of a' casing or casing member and a shell or shell member rigidly secured together, the latter provided with openings of any desired configuration to form the brambles, and the depth of which is determined by the thickness of the shell, so that all the brambles will be of precisely the same depth, and therefore a perfectly round ball is obtained.

In practice it is usual to provide some forms of molds with a plug in the end thereof, which is frequently used for impressing the name upon the ball, and in the present instance this form of mold is shown in the drawings. In the present improvement, however,-this plug is used for centering the tightly into each of these molds or cups is a die cup or mold shell, and for which purpose the lug 7 is 18 a sufficient distance to receive the shell, which .is

8 for that purpose, and so center such s ell, the inner end of the plug and the inner side of the shell being shaped to conform one with the other so that the adjoining edges thereof will be shown as project1ng. to the mo provided with an openin I claim as my'invention:

ble forming openings through.

and a shell rigidly ing bramble forming openings extending therethrough.

3. A-golf ball mold comprising a casing and a shell fitted thereto and having bramextending thereble forming openings 2. A golf ball mold comprising a casing secured thereto and havshaped members, each comprising a casing and a shell fitted thereto and having openings therethrough all of the. same depth throughout.

6. A golf ball mold comprising a cupshaped member and a thin shell rigidly secured within said cup-shaped member and having openin therethrough conforming to the desired orm of brambles on the bal all of said openings being of the same depth.

having a plug projecting the inner wall thereof, and a shell fitted to reception of such plug.

8. A golf ball mold comprising a casin having a plug projecting thereinto beyond the inner wall thereof, and a shellfitted to the casing and having an opening for the reception of'such plug,

bramble forming openings extendi ng thei'ethrough, said shell projecting sligl tlyAheAlhW yondthe edge-of t-he" casin 4. A golf made up of a casing semi-spherical formation and secured ball mold comprising a cup and a shell, each of Signed at 1821 Park Row Building, New York, N. Y., this 25th day of September, 1911. to-

gather, the shell within the cup and having .openings therethrough to formthe-brambles Witnesses: W

' on the ball. C. S. WEED,

5. A golf ball mold comprising two cup- F. E. Boron.

7 A golf ball mold comprising a casing thereinto beyond the casing and having an opening for the sa1d shell having ERNST w. BUCKAU. 

